I would like to know what FOC is and what it means to run your board in FOC. The more details the better.
UPDATE: Here is the For Dummies version for anyone looking for the same answer I was. Feel free to read down the post for more technical information. People have provided some great links and info.
Comparing FOC to BLDC could be like comparing a 4-stroke to a 2-stroke or an on/off switch to a dimmer switch. BLDC is like an on/off switch when providing power to the motor. FOC is more like a dimmer switch when providing power to the motor. Very much like your 4-stroke motor, FOC is smoother and quieter and like your 2-stroke motor, BDLC can provide more torque but is louder and more rock and roll.
FOC will accelerate faster at low RPMs because it manipulates the torque directly. BLDC will accelerate faster at higher RPMs because of the bursts(on/off switch).
BLDC has a more raw feel to it. FOC is smoother and more refined.
FOC will lower your top speed a small amount.